PD remains unchanged, everything around it has changed.
@abhijit86k
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- 101 Posts
Weren't bicycles were supposed to be the epitome of repairable and reusable? Why is it that I need to buy a complete crankset rather than replace individual chainrings? Why is it so hard to find individual shifters and derailleurs without having to research cable pull ratios and compatibility?
Open Power Electronics
So... Strava just filed for IPO. Looks like I have a project for the monsoon season when it's too rainy to ride.
If only academic publishers had more funds to be able to produce papers and journals in multiple formats such as Epub, suitable for ebook readers... Alas.
".... you're going to end up working at Chipotle. Or worse Deloitte"
In the big picture, however, the carbon cost of cycling vs driving per mile is about 400g/mile or 250g/km. Last week, a few important people hosted a wedding in Venice and racked up an estimated 5000 tonnes of CO2 equivalent, which is about 20e6 km of driving (about 2000 years' worth of my driving), so perhaps it really doesn't matter if I drive or cycle or walk or take the bus...
The catch, of course, is that clocking that distance on weekend rides, brevets, or gran fondos does not count because it does not displace car miles -- except perhaps if it leaves your legs too sore to drive. The 430 miles should come from commuting to work, shopping, and other trips previously taken by car.
Today I learned about the rule of 430.
Basically, according to [Trek](https://www.trekbikes.com/us/en_US/the-rule-of-430/), riding your bike for 430 miles (about 700km) will offset the carbon emissions of manufacturing the bike.
The 430mi/700km estimate is based on Trek's own bikes and manufacturing processes, but the figure should be in the same order of magnitude for most other bikes, probably lower than other less `fancy' bicycles.